CN116219896B - A prefabrication and installation device and construction method for bridge substructure - Google Patents

Abstract

A prefabrication and installation device and construction method for bridge substructures are disclosed. The device includes: a structural platform with through holes for bridge piers to pass through; a climbing load-bearing system, located outside the bridge piers and connected to the structural platform, for driving the structural platform to move up and down along the bridge piers; at least two climbing load-bearing systems; a moving system, located on the structural platform and movable along the platform; a rotating hoisting system, including a lifting mechanism, a spreader beam, a rotating mechanism, and a lifting device; at least two lifting mechanisms, spaced apart on the moving system, the lifting mechanisms being detachably connected to the spreader beam for driving the spreader beam to rise and fall; the rotating mechanism being connected to both the spreader beam and the lifting device for driving the lifting device to rotate; and a control system connected to the climbing load-bearing system, the moving system, and the rotating hoisting system. This invention addresses the shortcomings of existing bridge substructure construction technologies.

Description

Bridge substructure prefabrication and installation device and construction method

Technical Field

The invention belongs to the technical field of bridge construction, and particularly relates to a bridge substructure prefabrication and installation device and a construction method.

Background

The method is characterized in that the bridge pier column, the middle tie beam and the capping beam of the lower structure of the bridge are basically installed at the original position of the bridge structure, concrete is poured, the template structure is removed, the middle tie beam bearing template structure is installed, the middle tie beam concrete is poured, the middle tie beam bearing template structure is removed, the capping beam bearing template structure is installed, the capping beam concrete is poured, and the capping beam bearing template structure is removed.

The construction of the lower structure of the domestic bridge is tried by adopting the prefabrication and installation technology, but the lower structure of the domestic bridge can only be basically used for bridges in municipal bridges and plain areas with shorter bridge heights, meanwhile, the construction of the lower structure of the bridge basically needs to enable large-scale hoisting equipment to hoist bridge prefabricated members, so that the construction cost is greatly improved, in addition, the large-scale hoisting equipment also provides higher requirements for the geographical environment of construction sites, and the lower structure of the domestic bridge is more difficult to popularize in mountain areas with severe geographical environments and when pier studs of the bridge are higher.

Disclosure of Invention

The invention aims to provide a bridge substructure prefabrication installation device and a construction method, which can solve the defects in the existing bridge substructure construction technology.

The invention is realized by the following technical scheme:

a prefabricated installation device for a lower structure of a bridge,

Comprising the following steps:

The structure platform is provided with a through hole for the bridge pier to pass through;

the climbing bearing systems are arranged on the outer sides of the piers, are connected with the structural platforms and are used for driving the structural platforms to move up and down along the piers, and the number of the climbing bearing systems is at least two;

the moving system is arranged on the structural platform and can move along the structural platform;

The lifting mechanism is detachably connected with the shoulder pole beam and used for driving the shoulder pole beam to lift, and the rotating mechanism is respectively connected with the shoulder pole beam and the lifting appliance and used for driving the lifting appliance to rotate;

and the control system is respectively connected with the climbing bearing system, the moving system and the rotary hoisting system.

Further, the climbing bearing system comprises a first hoop mechanism and a second hoop mechanism which are vertically sleeved outside the pier and used for clamping or loosening the pier, and two screw rod climbing mechanisms arranged on two sides of the pier, wherein the screw rod climbing mechanisms comprise screw rod supports, transmission screw rods, nut assemblies and driving assemblies, the top ends of the screw rod supports are connected with the structural platform, the bottom ends of the screw rod supports are connected with the second hoop mechanism, the transmission screw rods are arranged in the screw rod supports through bearing assemblies, the transmission screw rods are rotationally connected with the bearing assemblies, the driving assemblies are connected with the transmission screw rods and used for driving the transmission screw rods to rotate, the nut assemblies are in threaded connection with the transmission screw rods and move along the transmission screw rods when the transmission screw rods rotate, and the nut assemblies are connected with the first hoop mechanisms.

Further, the climbing bearing system further comprises a roller mechanism, the roller mechanism comprises two roller assemblies and two elastic assemblies, the roller assemblies comprise roller connecting plates and balance rollers, the roller connecting plates are hinged to the bottom ends of the nut connecting plates, the balance rollers are rotatably arranged on the roller connecting plates, the elastic assemblies comprise adjusting screws, pressure springs, pressure plates and pressure nuts, the pressure plates are arranged on the roller connecting plates, the adjusting screws penetrate through the pressure plates, the pressure nuts are located above the pressure plates and are in threaded connection with the adjusting screws, the pressure springs are sleeved on the outer sides of the adjusting screws, and two ends of the pressure springs are connected with the pressure plates and the nut connecting plates respectively.

Further, the bearing assembly comprises a bearing seat plate, a first thrust bearing, a first locking piece, a first pivot plate, a second thrust bearing, a regulating plate and a second locking piece, wherein the top end of the transmission screw is arranged on the bearing seat plate through the first thrust bearing, the bearing seat plate is arranged on the screw rod bracket, the first locking piece is arranged on the transmission screw rod and is contacted with the first thrust bearing, the first pivot plate is sleeved outside the bottom end of the transmission screw rod and is arranged on the screw rod bracket, the regulating plate is arranged on the transmission screw rod and is contacted with one side of the first pivot plate away from the bearing seat plate, the second thrust bearing is arranged on the transmission screw rod and is contacted with one side of the regulating plate away from the first pivot plate, and the second locking piece is arranged on the transmission screw rod and is contacted with the second thrust bearing.

Further, the moving system comprises a track arranged at the top end of the structural platform and a translation trolley arranged on the track in a sliding manner, and the hoisting mechanism comprises a winch, a steel wire rope connected with the winch, a fixed pulley block arranged on the translation trolley and a movable pulley block detachably arranged on the shoulder pole beam, wherein the steel wire rope is fixed on the movable pulley block after sequentially bypassing the movable pulley block and the fixed pulley block.

Further, rotary mechanism includes first rotatory steelframe, power pack, plane bearing and second rotatory steelframe, and first rotatory steelframe sets up on the shoulder pole roof beam, and power pack sets up in first rotatory steelframe to be connected with the rotatory steelframe of second for it is rotatory to drive the rotatory steelframe of second, and the rotatory steelframe cover of second is established in first rotatory steelframe outside, and is connected with first rotatory steelframe through plane bearing, and the hoist setting is on the rotatory steelframe of second.

Further, the first hoop mechanism is a three-leaf pin hinged hoop, the three-leaf pin hinged hoop comprises a first arc module, a second arc module and a third arc module which are sequentially hinged, and a plurality of pull-in jacks used for locking, fixing or unlocking and separating the first arc module and the third arc module, and the second hoop mechanism has the same structure as the first hoop mechanism;

The structure platform comprises a main beam platform, two first platforms and two second platforms, wherein the penetrating holes are formed in the main beam platform, the first platforms and the second platforms are of rectangular frame structures, the first platforms and the second platforms comprise U-shaped frames and first movable frames, two ends of each first movable frame are detachably arranged at two ends of each U-shaped frame, the main beam platform is connected with the top ends of each screw rod support, the two first platforms are respectively in one-to-one correspondence with the two first hoop mechanisms, the second arc-shaped modules of the first hoop mechanisms are movably connected with the U-shaped frames of the corresponding first platforms through a plurality of first connecting assemblies, and the first arc-shaped modules and the third arc-shaped modules of the first hoop mechanisms are respectively movably connected with the U-shaped frames of the corresponding first platforms through the first connecting assemblies;

The two second platforms are respectively in one-to-one correspondence with the two second hoop mechanisms, the second arc-shaped modules of the second hoop mechanisms are connected with the corresponding U-shaped frames of the second platforms through a plurality of second connecting components, and the first arc-shaped modules and the third arc-shaped modules of the second hoop mechanisms are respectively and movably connected with the corresponding U-shaped frames of the second platforms through third connecting components.

Further, the structure platform still includes third platform, support frame and third staple bolt mechanism, and the third platform is located between two second platforms, and is connected with the girder platform through the support frame, and the third platform is rectangular frame structure, and the third platform includes two mounts that set up relatively and two second movable frames that set up relatively, and demountable installation is on two mounts respectively at the both ends of second movable frame, and two mounts of third platform are connected with third staple bolt mechanism through fourth coupling assembling respectively.

Further, the first connecting assembly comprises a fourth bracket steel plate, a second bracket upper hanging plate and a second bracket lower hanging plate, the second bracket upper hanging plate is connected with the first platform, the second bracket lower hanging plate is rotatably arranged on the second bracket upper hanging plate and connected with the fourth bracket steel plate, and the fourth bracket steel plate is connected with the first hoop mechanism;

The second connecting assembly comprises a first bracket steel plate and two first bracket connecting plates respectively arranged at two sides of the first bracket steel plate, one first bracket connecting plate is detachably connected with a second arc-shaped module of the second hoop mechanism, the other first bracket connecting plate is detachably connected with a first bracket fixing plate, and the first bracket fixing plate is connected with a U-shaped frame of the second platform;

The third connecting assembly comprises a second bracket steel plate, a third bracket steel plate, a second bracket fixing plate, a first bracket upper hanging plate, a first bracket lower hanging plate and a third bracket fixing plate, one end of the second bracket steel plate is detachably connected with a first arc module or a third arc module of the second hoop mechanism, the upper part of the other end of the second bracket steel plate is connected with the third bracket steel plate, the first bracket upper hanging plate is arranged at the bottom end of the third bracket steel plate, the first bracket lower hanging plate is rotationally arranged on the first bracket and is connected with the third bracket fixing plate, the third bracket fixing plate is connected with a U-shaped frame of the second platform, and two ends of the second bracket fixing plate are detachably connected with the second bracket steel plate and the third bracket fixing plate respectively.

The invention also provides a bridge lower structure prefabrication installation construction method, which is based on the bridge lower structure prefabrication installation device and comprises the following steps:

S1, prefabricating pier sections, middle tie beam sections and capping beam sections, wherein the pier sections comprise pier column sections and pier tie beam sections, and the capping beam sections comprise capping beam pier column sections and capping beam span middle sections;

s2, marking pier positions of all piers and placing positions of climbing bearing systems, installing a prefabricated installation device of a lower structure of a bridge, placing the climbing bearing systems at the placing positions, and anchoring the structural platform by using cables;

S3, constructing the bridge pier in stages through a bridge lower structure prefabrication and installation device;

S31, for each construction stage, using a rotary hoisting system to install pier segments according to a pre-marked sequence to form piers, until the height of the piers installed in the construction stage reaches a preset first set height;

S32, driving the structural platform to climb along the pier by using the climbing bearing system to preset a second set height;

s33, repeating the step S31 and the step S32 until the installation of the bridge pier is completed;

S4, installing the capping beam pier column sections on each pier by using a rotary hoisting system, and installing a capping beam span section between two adjacent capping beam pier column sections by using the rotary hoisting system;

S5, installing a middle tie beam from top to bottom by using a rotary hoisting system;

S51, reserving one lifting mechanism to be connected with the shoulder pole beam, removing the connection between the rest lifting mechanisms and the shoulder pole beam, lowering the shoulder pole beam below the capping beam through the lifting mechanism connected with the shoulder pole beam, and then connecting all the lifting mechanisms with the shoulder pole beam;

s52, mounting the middle tie beam section to a preset mounting position by utilizing a rotary hoisting system, so that the middle tie beam section is fixed with two adjacent bridge pier tie beam sections;

S53, reserving one lifting mechanism to be connected with the carrying pole beam, removing the connection between the other lifting mechanisms and the carrying pole beam, lowering the carrying pole beam below the installed middle tie beam through the lifting mechanism connected with the carrying pole beam, or driving the lifting mechanism and the carrying pole beam to move to another installation position through a moving system, and then connecting all the lifting mechanisms with the carrying pole beam;

S54, repeating the steps S52 to S53, and installing all middle tie beam sections according to a pre-marked sequence;

s6, driving the structural platform to descend to the ground along the bridge pier through the climbing bearing system, and removing the bridge substructure prefabricated installation device.

Compared with the prior art, the invention has the beneficial effects that:

(1) According to the invention, a climbing bearing system is arranged, a bridge prefabricated member is lifted by a rotary lifting system, and then the bridge prefabricated member is moved to an installation position by a moving system for lifting, so that the problems that bridge pier, middle tie beam and bent cap sections are matched and intensively prefabricated into bridge prefabricated members, and then the bridge prefabricated members are transported to a site for matching, installation and consolidation into a whole are solved, the bridge pier, middle tie beam and bent cap of a bridge in a mountain area, especially the bridge pier, middle tie beam and bent cap of a high pier bridge, can only adopt a site installation template system, and a process technology of casting concrete in site is adopted, and the product quality of the bridge prefabricated member is greatly improved due to the adoption of concentrated prefabrication, the problems that a reinforcement protection layer of a traditional cast-in-place concrete process is difficult to control and the qualification rate is lower are thoroughly solved, and meanwhile, the bridge crane is more energy-saving and environment-friendly and saves a great amount of construction cost;

(2) The invention is convenient to install and dismantle, can meet the requirements of various geographic environments, improves the quality control, construction safety control and construction cost control of the lower structure of the bridge, and is convenient for popularization and application of bridge construction of high pier columns in different geographic environments.

Drawings

FIG. 1 is a schematic diagram of a prefabricated bridge substructure installation apparatus according to the present invention;

FIG. 2 is a schematic view of a climbing support system disposed on a pier in a prefabricated bridge substructure installation apparatus according to the present invention;

FIG. 3 is a schematic structural view of a screw rod climbing mechanism in the bridge substructure prefabrication and installation device of the present invention;

FIG. 4 is a schematic diagram showing the connection of a nut assembly to a roller mechanism in a bridge substructure prefabrication installation apparatus according to the present invention;

FIG. 5 is a cross-sectional view A-A of FIG. 1;

FIG. 6 is a schematic view of a rotating mechanism in a prefabricated bridge substructure installation apparatus according to the present invention;

FIG. 7 is a cross-sectional view B-B of FIG. 2;

FIG. 8 is a cross-sectional view of C-C of FIG. 2;

FIG. 9 is a top view of a third platform and third hoop mechanism in a bridge substructure pre-fabricated mounting apparatus of the present invention;

FIG. 10 is a schematic view of a first connection assembly of the prefabricated bridge substructure installation apparatus according to the present invention;

FIG. 11 is a schematic view of a second connection assembly of the prefabricated bridge substructure installation apparatus according to the present invention;

FIG. 12 is a schematic view of a third connection assembly of the prefabricated bridge substructure installation apparatus according to the present invention;

FIG. 13 is a construction flow chart of a method for prefabricating, installing and constructing a bridge substructure, wherein FIG. ① is a schematic view of a section of an installed pier column, FIG. ② is a schematic view of a section of an installed pier column after climbing, FIG. ③ is a schematic view of a section of an installed capping beam, and FIG. ④ is a schematic view of a section of an in-installation tie beam;

fig. 14 is a cross-sectional view of a tie beam segment in installation in a bridge substructure prefabrication installation construction method according to the present invention.

In the figure, the structure comprises a 1-structure platform, a 11-girder platform, a 12-first platform, a 13-second platform, a 14-third platform, a 15-supporting frame, a 16-third hoop mechanism, a 17-U-shaped frame, a 18-first movable frame, a 19-fixed frame, a 110-second movable frame, a 2-climbing bearing system, a 21-first hoop mechanism, a 22-second hoop mechanism, a 23-screw climbing mechanism, a 231-screw bracket, a 232-transmission screw, a 233-nut assembly, a 234-driving assembly, a 2341-motor, a 2342-reduction gearbox, a 2343-second fulcrum plate, a 2344-coupling, a 235-bearing assembly, a 2351-bearing seat plate, a 2352-first thrust bearing and a 2353-first locking member, 2354-first fulcrum plate, 2355-second thrust bearing, 2356-centering plate, 2357-second locking member, 24-roller mechanism, 241-roller assembly, 2411-roller connecting plate, 2412-balance roller, 242-elastic assembly, 2421-adjusting screw, 2422-pressure spring, 2423-pressure plate, 2424-pressure nut, 25-first arc module, 26-second arc module, 27-third arc module, 28-pull-in jack, 3-moving system, 31-track, 32-translating carriage, 4-rotating hoisting system, 41-hoisting mechanism, 411-hoist, 412-wire rope, 413-fixed pulley block, 414-movable pulley block, 42-shoulder beam, 43-rotating mechanism, 431-first rotating steel frame, 432-power unit, 433-plane bearing, 434-second rotating steel frame, 44-lifting appliance, 5-control system, 6-first connecting component, 61-fourth bracket steel plate, 62-second bracket upper hanging plate, 63-second bracket lower hanging plate, 7-second connecting component, 71-first bracket steel plate, 72-first bracket connecting plate, 73-first bracket fixing plate, 8-third connecting component, 81-second bracket steel plate, 82-third bracket steel plate, 83-second bracket fixing plate, 84-first bracket upper hanging plate, 85-first bracket lower hanging plate, 86-third bracket fixing plate, 9-fourth connecting component, 10-pier, 101-pier stud segment, 102-pier beam segment, 20-pier beam, 201-cap beam stud segment, 202-cap beam span middle segment, 30-middle beam segment.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a prefabricated installation device for a bridge substructure according to the present invention. The utility model provides a prefabricated installation device of bridge substructure, including structural platform 1, climb bearing system 2, moving system 3, rotatory hoist and mount system 4 and control system 5, the traversing hole that supplies pier 10 to pass is offered on the structural platform 1, climb bearing system 2 sets up in the pier 10 outside, and be connected with structural platform 1, be used for driving structural platform 1 and reciprocate along pier 10, the quantity of climbing bearing system 2 is two at least, moving system 3 sets up on structural platform 1, and can follow structural platform 1 and remove, rotatory hoist and mount system 4 includes lifting mechanism 41, shoulder pole roof beam 42, rotary mechanism and hoist 44, the quantity of lifting mechanism 41 is two at least and the interval sets up on moving system 3, lifting mechanism 41 can dismantle with shoulder pole roof beam 42 and be connected, be used for driving shoulder pole roof beam 42 to go up and down, rotary mechanism is connected with shoulder pole roof beam 42 and hoist 44 respectively, be used for driving hoist 44 to rotate, control system 5 is connected with climbing bearing system 2 respectively, moving system 3 and rotatory hoist and hoist system 4 respectively.

Referring to fig. 2 in combination, fig. 2 is a schematic diagram of a climbing bearing system disposed on a pier in the prefabricated installation device for a bridge substructure according to the present invention. The climbing bearing systems 2 are respectively arranged on the corresponding piers 10, in one embodiment, the climbing bearing systems 2 comprise a first hoop mechanism 21 and a second hoop mechanism 22 which are vertically sleeved outside the piers 10 and are used for clamping or loosening the piers 10, and two screw climbing mechanisms 23 arranged on two sides of the piers 10, each screw climbing mechanism 23 comprises a screw support 231, a transmission screw 232, a nut component 233 and a driving component 234, the top end of each screw support 231 is connected with the structural platform 1, the bottom end of each screw support 231 is connected with the second hoop mechanism 22, the transmission screw 232 is arranged in each screw support 231 through a bearing component 235, the transmission screw 232 is rotatably connected with the bearing component 235, the driving component 234 is connected with the transmission screw 232 and is used for driving the transmission screw 232 to rotate, the nut component 233 is in threaded connection with the transmission screw 232 and moves along the transmission screw when the transmission screw 232 rotates, and the nut component 233 is connected with the first hoop mechanism 21. The two climbing bearing systems 2 are respectively arranged on the two piers 10 in the longitudinal bridge direction, so that the lifting of the structural platform 1 is more stable. The first anchor ear mechanism 21 is located the top of second anchor ear mechanism 22, press from both sides tightly or loosen pier 10 through first anchor ear mechanism 21 and second anchor ear mechanism 22 in proper order for first anchor ear mechanism 21 and second anchor ear mechanism 22 become a fulcrum in the climbing process in turn, thereby can change the supporting point of structural platform 1 on pier 10 respectively to first anchor ear mechanism 21 and second anchor ear mechanism 22 on, then through the rotatory drive transmission lead screw, make nut subassembly 233 and drive lead screw 232 take place relative movement, accomplish the climbing function of structural platform 1.

Referring to fig. 3 in combination, fig. 3 is a schematic structural diagram of a screw rod climbing mechanism in the prefabricated installation device for the bridge substructure according to the present invention. in one embodiment, the bearing assembly 235 includes a bearing plate 2351, a first thrust bearing 2352, a first retaining member 2353, a first fulcrum plate 2354, a second thrust bearing 2355, The top end of the transmission screw 232 is arranged on the bearing seat plate 2351 through a first thrust bearing 2352, the bearing seat plate 2351 is arranged on the screw rod bracket 231, the first locking member 2353 is arranged on the transmission screw rod 232 and is contacted with the first thrust bearing 2352, the first supporting point plate 2354 is sleeved outside the bottom end of the transmission screw rod and is arranged on the screw rod bracket 231, the adjustment plate 2356 is arranged on the transmission screw rod 232 and is contacted with one side of the first supporting point plate 2354 far away from the bearing seat plate 2351, the second thrust bearing 2355 is arranged on the transmission screw rod 232 and is contacted with one side of the adjustment plate 2356 far away from the first supporting point plate 2354, and the second locking member 2357 is arranged on the transmission screw rod 232 and is contacted with the second thrust bearing 2355. The transmission screw 232 is rotated by the driving assembly 234 by the first and second thrust bearings 2352 and 2355, and then the transmission screw 232 is fastened to the bearing seat plate 2351 and the first fulcrum plate 2354 by the first and second locking members 2353 and 2357, thereby being fastened to the screw bracket 231. In actual use, when the transmission screw 232 rotates and the nut component 233 ascends or descends, the transmission screw 232 is suspended by taking the upper part as a suspension fulcrum and through the bearing seat plate 2351, the first thrust bearing 2352 and the first locking piece 2353, and is in a suspension tension state, while when the nut component 233 is fixed and reacts to the ascending or descending of the transmission screw 232, the transmission screw 232 is suspended by taking the nut component 233 as an upper suspension fulcrum and through the first fulcrum plate 2354, the second thrust bearing 2355 and the second locking piece 2357, so that the working state of the transmission screw 232 is always in a tension-bearing pull rod state, the transmission screw 232 is prevented from being in a compression-bending damage caused by the compression-bearing state during working, the transmission screw 232 can be a relatively thin screw, and the cost is reduced. The adjusting plate 2356 is used for adjusting the central axis of the transmission screw, the opening on the first supporting plate 2354 is larger than the large hole of the transmission screw 232, the opening on the adjusting plate 2356 is a small hole matched with the transmission screw 232, the first supporting plate 2354 and the adjusting plate 2356 are not fixed during installation, the transmission screw 232 is driven to rotate for a period of time, the central axis of the transmission screw 2 and the central axis of the driving assembly 234 are overlapped and coaxial as much as possible, the optimal central position is found, and then the adjusting plate 2356 and the first supporting plate 2354 are fixed, so that the automatic centering function is achieved, and the central errors in the manufacturing and assembling processes are reduced. in one embodiment, the first locking member 2353 and the second locking member 2357 are both locking nuts.

In one embodiment, the nut assembly 233 includes a screw nut and a nut connecting plate, the screw nut is in threaded connection with the driving screw, the nut connecting plate is sleeved outside the driving screw and is disposed on the screw nut, and the nut connecting plate is connected with the first hoop mechanism 21. When the transmission screw rod 232 rotates, the screw nut drives the nut connecting plate to linearly move along the transmission screw rod 232 under the limit of the nut connecting plate.

Referring to fig. 4 in combination, fig. 4 is a schematic connection diagram of a nut assembly and a roller mechanism in the bridge substructure prefabrication installation apparatus according to the present invention. In an embodiment, the climbing bearing system 2 further comprises a roller mechanism 24, the roller mechanism 24 comprises two roller assemblies 241 and two elastic assemblies 242, the roller assemblies 241 comprise a roller connecting plate 2411 and a balance roller 2412, the roller connecting plate 2411 is hinged to the bottom end of a nut connecting plate, the balance roller 2412 is rotatably arranged on the roller connecting plate 2411, the elastic assemblies 242 comprise an adjusting screw 2421, a pressure spring 2422, a pressure plate 2423 and a pressure nut 2424, the pressure plate 2423 is arranged on the roller connecting plate 2411, the adjusting screw 2421 is arranged on the pressure plate 2423 in a penetrating manner, the pressure nut 2424 is located above the pressure plate 2423 and is in threaded connection with the adjusting screw 2421, the pressure spring 2422 is sleeved on the outer side of the adjusting screw 2421, and two ends of the pressure spring 2422 are respectively connected with the pressure plate 2423 and the nut connecting plate. The length of the adjusting screw 2421 extending upwards from the pressure plate 2423 can be adjusted through the screw action of the adjusting screw 2421 and the adjusting nut, the roller connecting plate 2411 is enabled to rotate through the abutting of the adjusting screw 2421 and the nut connecting plate, the displacement of the balance roller 2412 on the plane space is achieved, the contact pressure between the balance roller 2412 and the screw rod bracket 231 is enabled to be correspondingly changed, the supporting force between the balance roller 2412 and the screw rod bracket 231 is adjusted, the horizontal friction force between the transmission screw 232 and the nut mechanism can be balanced, the balance clearance fit between the transmission screw 232 and the screw teeth of the nut mechanism is kept, and when sundries or partial lack of flatness exists on the side surface of the screw rod bracket 231, the adjusting screw 2421 and the nut connecting plate are in a contact or separation exchange state, the pressure spring 2422 ensures the relative stability of the balance roller 2412 and the screw rod bracket 2311 through increasing energy storage (compressed) or releasing energy storage (extension), and the vibration is reduced, and the wire clearance between the transmission screw 232 and the nut mechanism is kept in a good state. In one embodiment, the number of roller mechanisms 24 is two, and two roller mechanisms 24 are spaced apart. This arrangement can further balance the horizontal friction between the drive screw 232 and the nut mechanism, maintaining a balanced clearance fit of the drive screw 232 and the teeth of the nut mechanism.

In one embodiment, the driving assembly 234 includes a motor 2341, a reduction gearbox 2342, a second supporting plate 2343 and a coupling 2344, wherein an output shaft of the motor 2341 is connected with the reduction gearbox 2342, the reduction gearbox 2342 is connected with the transmission screw 232 through the coupling 2344, and the second supporting plate 2343 is connected with the reduction gearbox 2342 and the screw support 231 respectively. The driving assembly 234 may be disposed at the bottom end of the screw support 231, the coupling is connected to the bottom end of the driving screw 232, and the motor drives the driving screw 232 to rotate through the reduction gearbox and the coupling.

Referring to fig. 5 in combination, fig. 5 is a cross-sectional view A-A of fig. 1. In an embodiment, the moving system 3 comprises a track 31 arranged at the top end of the structural platform 1 and a translation trolley 32 arranged on the track 31 in a sliding manner, the lifting mechanism 41 comprises a winch 411, a steel wire rope 412 connected with the winch 411, a fixed pulley block 413 arranged on the translation trolley 32 and a movable pulley block 414 detachably arranged on the shoulder pole beam 42, and the steel wire rope 412 sequentially bypasses the movable pulley block 414 and the fixed pulley block 413 and then is fixed on the movable pulley block 414. The track 31 is arranged along the longitudinal bridge direction, and the trolley 32 is moved on the track 31 to drive the winch 411 to move, so as to drive the shoulder pole beam 42, the rotating mechanism and the lifting appliance 44 to move. The hoist 411 drives the shoulder pole beam 42 to ascend or descend through the steel wire rope 412, the fixed pulley block 413 and the movable pulley block 414.

Referring to fig. 6 in combination, fig. 6 is a schematic structural view of a rotating mechanism in the prefabricated installation device for a bridge substructure according to the present invention. In an embodiment, the rotating mechanism 43 includes a first rotating steel frame 431, a power unit 432, a planar bearing 433 and a second rotating steel frame 434, the first rotating steel frame 431 is disposed on the shoulder pole beam 42, the power unit 432 is disposed in the first rotating steel frame 431 and connected with the second rotating steel frame 434, and is used for driving the second rotating steel frame 434 to rotate, the second rotating steel frame 434 is sleeved outside the first rotating steel frame 431 and connected with the first rotating steel frame 431 through the planar bearing 433, and the lifting appliance 44 is disposed on the second rotating steel frame 434. The second rotating steel frame 434 rotates around the first rotating steel frame 431 as a center under the power of the power unit 432, supported by the plane bearing 433.

Referring to fig. 7 and 8 in combination, fig. 7 is a sectional view of B-B in fig. 2, and fig. 8 is a sectional view of C-C in fig. 2. In the first embodiment, the first hoop mechanism 21 is a three-leaf pin hinged hoop, the three-leaf pin hinged hoop comprises a first arc module 25, a second arc module 26 and a third arc module 27 which are sequentially hinged, a plurality of pull-in jacks 28 used for locking and fixing or unlocking the first arc module 25 and the third arc module 27, the second hoop mechanism 22 and the first hoop mechanism 21 are the same in structure, the structural platform 1 comprises a main beam platform 11, two first platforms 12 and two second platforms 13, the two first platforms 12 and the second platforms 13 penetrate through holes and are arranged on the main beam platform 11, the first platforms 12 and the second platforms 13 are of rectangular frame structures, the first platforms 12 and the second platforms 13 comprise U-shaped frames 17 and first movable frames 18, two ends of the first movable frames 18 are detachably mounted at two ends of the U-shaped frames 17, the main beam platform 11 and the top ends of the screw rod support 231 are connected, the two first platforms 12 are respectively corresponding to the two first hoop mechanisms 21, the second arc modules 26 of the first hoop mechanism 21 are correspondingly connected with the first arc modules 12 through first arc modules 6 and the second arc modules 17 of the first movable frames 17 and the second arc modules 17 through the first arc modules 6 and the second arc modules 17 of the first movable frames 17 and the second arc modules 17, and the first movable frames 17 are correspondingly connected with the second arc modules 17 through the first arc modules of the first platforms 7 and the second arc modules of the first movable frames 17 and the second arc modules 13. The main beam platform 11, the two first platforms 12 and the two second platforms 13 are firmly connected into a whole through the climbing bearing system 2. A second platform 13 is available for mounting the control system 5. The first platform 12 and the second platform 13 are sleeved outside the bridge pier 10, the first movable frame 18 is arranged on the first platform 12 and the second platform 13, the first arc-shaped module 25 and the third arc-shaped module 27 of the first hoop mechanism 21 are movably connected with the U-shaped frame 17 of the first platform 12 through the first connecting assembly 6, and the first arc-shaped module 25 and the third arc-shaped module 27 of the second hoop mechanism 22 are movably connected with the U-shaped frame 17 of the first platform 12 through the third connecting assembly 8, so that the first platform 12 and the second platform 13 can penetrate through structural barriers of the bridge pier 10, which are used for installing the middle tie beams and protrude out of the outer side face of the bridge pier 10.

Referring to fig. 10, 11 and 12 in combination, fig. 10 is a schematic structural view of a first connection assembly in the prefabricated installation device for a lower structure of a bridge according to the present invention, fig. 11 is a schematic structural view of a second connection assembly in the prefabricated installation device for a lower structure of a bridge according to the present invention, and fig. 12 is a schematic structural view of a third connection assembly in the prefabricated installation device for a lower structure of a bridge according to the present invention. In one embodiment, the first connecting assembly 6 includes a fourth bracket steel plate 61, a second bracket upper suspension plate 62 and a second bracket lower suspension plate 63, the second bracket upper suspension plate 62 is connected to the first platform 12, the second bracket lower suspension plate 63 is rotatably disposed on the second bracket upper suspension plate 62 and connected to the fourth bracket steel plate 61, and the fourth bracket steel plate 61 is connected to the first hoop mechanism 21; the second connecting assembly 7 comprises a first bracket steel plate 71 and two first bracket connecting plates 72 which are respectively arranged on two sides of the first bracket steel plate 71, one first bracket connecting plate 72 of the two first bracket connecting plates 72 is detachably connected with the second arc module 26 of the second hoop mechanism 22, the other first bracket connecting plate 72 is detachably connected with a first bracket fixing plate 73, the first bracket fixing plate 73 is connected with the U-shaped frame 17 of the second platform 13, the third connecting assembly 8 comprises a second bracket steel plate 81, a third bracket steel plate 82, a second bracket fixing plate 83, a first bracket upper hanging plate 84, a first bracket lower hanging plate 85 and a third bracket fixing plate 86, one end of the second bracket steel plate 81 is detachably connected with the first arc module 25 or the third arc module 27 of the second hoop mechanism 22, the other end upper part of the second bracket steel plate 81 is connected with the third bracket steel plate 82, the first bracket upper hanging plate 84 is arranged at the third bracket steel plate 82, the first bracket hanging plate 86 is rotatably connected with the third bracket steel plate 86 at the bottom end of the third bracket steel plate 86, and the second bracket fixing plate is rotatably connected with the third bracket fixing plate 17. The lower hanging plate 63 of the second bracket is rotationally connected with the upper hanging plate 62 of the second bracket, when the first hoop mechanism 21 is in a loose state, the first arc-shaped module 25 and the third arc-shaped module 27 of the first hoop mechanism 21 can freely displace to separate from the pier 10, and when the first hoop mechanism 21 is in a tight pull, the pivot conversion supporting stress can be realized. The second bracket fixing plate 83 can be removed during climbing, so that the second platform 13 forms a movable hanging structure through the second bracket steel plate 81, the third bracket steel plate 82, the first bracket upper hanging plate 84, the first bracket lower hanging plate 85 and the third bracket fixing plate 86, the first arc-shaped module 25 and the third arc-shaped module 27 of the second hoop mechanism 22 can be rotated to be separated from the bridge pier 10 in a loosening state of the second hoop mechanism 22, and the second bracket fixing plate 83 can be installed during lifting, so that the stress safety under a heavy load working condition can be met.

Referring to fig. 9 in combination, fig. 9 is a top view of a third platform and a third hoop mechanism in the bridge substructure prefabrication installation apparatus according to the present invention. In an embodiment, the structural platform 1 further includes a third platform 14, a supporting frame 15 and a third hoop mechanism 16, the third platform 14 is located between the two second platforms 13 and connected with the main beam platform 11 through the supporting frame 15, the third platform 14 is of a rectangular frame structure, the third platform 14 includes two fixing frames 19 oppositely arranged and two second movable frames 110 oppositely arranged, two ends of the second movable frames 110 are respectively detachably mounted on the two fixing frames 19, and the two fixing frames 19 of the third platform 14 are respectively connected with the third hoop mechanism 16 through the fourth connecting component 9. When three piers 10 are installed, a third platform 14, a supporting frame 15 and a third hoop mechanism 16 are added, so that the third hoop mechanism 16 clamps or loosens the pier 10 positioned in the middle, the supporting point of the structural platform 1 is increased, and the structural platform 1 is more stable as a whole. The third platform 14 is provided with two detachable second movable frames 110, so that the third platform 14 can penetrate through structural barriers on the bridge pier 10, which are used for installing the middle tie beam and protrude out of the outer side face of the bridge pier 10. The fourth connecting component 9 is a fifth bracket steel plate.

Referring to fig. 13 and 14 in combination, fig. 13 is a construction flow chart of the bridge substructure prefabrication installation construction method according to the present invention, wherein fig. ① is a pier column installation section schematic view, fig. ② is a pier column installation section schematic view after climbing, fig. ③ is a capping beam installation section schematic view, fig. ④ is a middle beam installation section schematic view, and fig. 14 is a cross-sectional view of the middle beam installation section in the bridge substructure prefabrication installation construction method according to the present invention. The invention also provides a bridge lower structure prefabrication installation construction method, which is based on the bridge lower structure prefabrication installation device and comprises the following steps:

S1, prefabricating pier segments, middle tie beam segments 30 and capping beam segments, wherein the pier segments comprise pier column segments 101 and pier tie beam segments 102, and the capping beam segments comprise capping beam pier column segments 201 and capping beam span middle segments 202;

In the step S1, the bridge pier 10, the middle tie beam and the cap beam are subjected to segment matching and segmentation so as to meet the requirements of convenient prefabrication, transportation and lifting of structural segments and original design performance, the bridge pier 10 comprises a plurality of bridge pier segments connected in sequence, the fixing mode between the bridge pier segments can be an existing mode, or a segmentation main rib is adopted, the bridge pier column segments 101 and the bridge pier tie beam segments 102 in the bridge pier segments can be installed according to specific installation requirements, the cap beam 20 consists of a plurality of cap beam pier column segments 201 and a plurality of cap beam span segments 202, the cap beam pier column segments 201 are arranged on the bridge pier 10, the cap beam span segments 202 are used for connecting two adjacent cap beam pier column segments 201, and the fixing mode between the cap beam pier column segments 201 and the bridge pier 10 and the cap beam span segments 202 can be an existing mode.

S2, marking pier positions of the piers 10 and placing positions for placing climbing bearing systems 2, installing a bridge substructure prefabricated installation device, enabling the climbing bearing systems 2 to be placed at the placing positions, and anchoring the structural platform 1 by cables;

In the above step S2, the center line of the pier position of each pier 10 is released and extended to the outside, the center cross line of each pier position is aligned, two second platforms 13 and third platforms 14 are placed at the corresponding pier positions, so that the climbing support system 2 is placed at the placement position, and then the structural platform 1 is anchored using cables, such as wind cables, so that the bridge substructure prefabrication installation apparatus is fixed on the ground.

S3, constructing the bridge pier 10 in stages through a bridge lower structure prefabrication and installation device;

S31, for each construction stage, using a rotary hoisting system 4 to install pier segments according to a pre-marked sequence to form piers 10 until the height of the piers 10 installed in the construction stage reaches a preset first set height;

In the above step S31, the prefabricated pier segment is transported to the lower part of the structural platform 1, the lifting tool 44 is connected with the pier segment, then the pier segment is lifted up by the lifting mechanism 41, and the pier segment is moved to the upper part of the corresponding pier position by the moving system 3, and is adjusted to be rotated to the installation position by the rotating mechanism, if the pier 10 is installed on the pier position, the pier segment is lowered onto the pier and fixed, if the pier 10 is not installed on the pier position, the pier segment is lowered onto the pier position and fixed, the pier 10 is formed, the above steps are repeated, the pier segment is installed according to the pre-marked sequence until the height of the pier 10 installed in the installation stage reaches the first set height, and the first set height can be set according to the height of the bridge substructure prefabricated installation device. In the construction process, the moving system 3 and the rotary hoisting system 4 are controlled by a control system 5.

S32, driving the structural platform 1 to climb along the pier 10 by using the climbing bearing system 2 to a preset second set height;

In the step S32, the bridge pier 10 is sequentially clamped or loosened by the first hoop mechanism 21 and the second hoop mechanism 22, so that the first hoop mechanism 21 and the second hoop mechanism 22 become a pivot in the climbing process in turn, so that the supporting points of the structural platform 1 on the bridge pier 10 can be respectively converted to the first hoop mechanism 21 and the second hoop mechanism 22, and then the nut component 233 and the transmission screw 232 are relatively moved by driving the transmission screw rod to complete the climbing function of the structural platform 1, the steps are repeated until the preset second set height is climbed, the second set height is set according to the first set height, and when the climbing bearing system 2 is required to be ensured to be clamped on the bridge pier 10, the lifting construction of the bridge lower structure prefabricated installation device can be supported. When climbing, the third hoop assembly is loosened to be in contact with the pier 10, and after climbing to a second set height, all hoop assemblies are clamped with the pier 10. The climbing of the climbing bearing system 2 is controlled by a control system 5.

S33, repeating the step S31 and the step S32 until the installation of the bridge pier 10 is completed;

in the step S33, the pier segments are continuously installed in the pre-marked sequence by the cooperation of the rotary hoisting system 4 and the moving system 3, so that the pier 10 is constructed from bottom to top until the construction of the pier 10 is completed,

S4, installing the capping beam pier column sections 201 on each pier 10 by using a rotary hoisting system 4, and installing a capping beam span middle section 202 between two adjacent capping beam pier column sections 201 by using the rotary hoisting system 4;

In the above step S4, the specific steps of step S41 are (1) transporting the capping beam pier column sections 201 to the lower side of the structural platform 1, connecting the slings 44 and the capping beam pier column sections 201, then hoisting the capping beam pier column sections 201 by the hoisting mechanism 41, and rotating the capping beam pier column sections 201 by a preset angle, such as 90 degrees, by the rotating mechanism, and moving the capping beam pier column sections 201 to the corresponding piers 10 by the moving system 3, mounting the capping beam pier column sections on the piers 10, (2) repeating the above step (1) to mount all the capping beam pier column sections 201 in a pre-marked order, (3) transporting the capping beam span center sections 202 to the lower side of the structural platform 1, connecting the slings 44 and the capping beam span center sections 202, then hoisting the capping beam span center sections 202 by the hoisting mechanism 41, and rotating the capping beam span center sections 202 by the rotating mechanism by a preset angle, such as 90 degrees, and moving the capping beam span center sections 202 to the upper side of the mounting position by the moving system 3, (4) mounting the capping beam span center sections 202 to the adjacent capping beam bridge center sections 202 by the hoisting mechanism 41 and fixing the capping beam span center sections 202 to the adjacent capping beam center sections 20 in the pre-marked order, (3) repeating the steps (20, and the steps) and (4) completing the steps).

S5, installing a middle tie beam from top to bottom by utilizing a rotary hoisting system 4;

s51, reserving one lifting mechanism 41 to be connected with the shoulder pole beam 42, disconnecting the other lifting mechanisms 41 from the shoulder pole beam 42, lowering the shoulder pole beam 42 below the capping beam 20 through the lifting mechanism 41 connected with the shoulder pole beam 42, and then connecting all the lifting mechanisms 41 with the shoulder pole beam 42;

In the above step S51, if the number of the lifting mechanisms 41 is two, one lifting mechanism 41 is left connected to the shoulder pole beam 42, the fixed pulley block 413 of the other lifting mechanism 41 is disconnected from the shoulder pole beam 42, at this time, the shoulder pole beam 42 is lowered below the cap beam 20 by the lifting mechanism 41 connected to the shoulder pole beam 42 to mount the middle tie beam below the cap beam 20, and then the fixed pulley block 413 of the lifting mechanism 41 is mounted on the shoulder pole beam 42 to hoist the middle tie beam segment 30.

S52, the middle tie beam section 30 is mounted to a preset mounting position by utilizing the rotary hoisting system 4, so that the middle tie beam section 30 is fixed with the two adjacent bridge pier tie beam sections 102;

In the above step S52, the specific steps of step S52 are (1) transporting the intermediate tie beam segment 30 to a position below the installation position, connecting the spreader 44 to the intermediate tie beam segment 30, then hoisting the intermediate tie beam segment 30 by the hoisting mechanism 41, and rotating the intermediate tie beam segment 30 by a predetermined angle by the rotating mechanism, and moving the intermediate tie beam segment 30 to a position above the installation position by the moving system 3, (2) lowering the intermediate tie beam segment 30 to the installation position by the hoisting mechanism 41 so that the intermediate tie beam segment 30 is installed on the adjacent two bridge pier tie beam segments 102, and (3) fixing the intermediate tie beam segment 30 to the adjacent two bridge pier tie beam segments 102.

S53, keeping one lifting mechanism 41 connected with the shoulder pole beam 42, disconnecting the other lifting mechanisms 41 from the shoulder pole beam 42, lowering the shoulder pole beam 42 below the installed middle tie beam through the lifting mechanism 41 connected with the shoulder pole beam 42, or driving the lifting mechanism 41 and the shoulder pole beam 42 to move to another installation position through the moving system 3, and then connecting all the lifting mechanisms 41 with the shoulder pole beam 42;

After one middle tie beam segment 30 is installed in step S53, the shoulder pole beam 42 needs to be moved under the installed middle tie beam segment 30 or between two other adjacent piers 10 due to the blocking of the middle tie beam segment 30 or the piers 10, so that one lifting mechanism 41 is kept connected with the shoulder pole beam 42, the fixed pulley block 413 of the other lifting mechanism 41 is disconnected with the shoulder pole beam 42, the shoulder pole beam 42 is lowered under the installed middle tie beam by the lifting mechanism 41 connected with the shoulder pole beam 42, or the lifting mechanism 41 and the shoulder pole beam 42 are driven by the moving system 3 to move to another installation position, namely, between two other adjacent piers 10, and the fixed pulley block 413 of the lifting mechanism 41 is installed on the shoulder pole beam 42 to continue to hoist the middle tie beam segment 30.

S54, repeating the steps S52 to S53, and installing all the middle tie beam segments 30 according to the pre-marked sequence;

In the above step S54, the middle tie beam segments 30 between two adjacent bridge piers 10 may be installed from top to bottom, after the middle tie beam segments 30 of the two adjacent bridge piers 10 are completed, the shoulder pole beam 42 may be moved between the other two adjacent bridge piers 10, and then the middle tie beam segments 30 may be installed in the order from top to bottom, so that the above steps may be repeated until all the middle tie beam segments 30 are installed. Compared with the traditional installation method of installing the middle tie beam and the cover beam from bottom to top, the installation method of the invention has the advantages that the installation flow can be simplified, the installation device is simplified, the installation is more convenient and quick, the construction cost can be saved, and the popularization and the application of the construction of the high pier column bridge in different geographic environments are facilitated by installing the cover beam and the middle tie beam from top to bottom through the bridge lower structure prefabricated installation device.

S6, driving the structural platform 1 to descend to the ground along the bridge pier 10 through the climbing bearing system 2, and dismantling the bridge substructure prefabricated installation device.

In the above step S6, after the installation of the bridge pier 10, the cap beam 20 and the middle tie beam is completed, the climbing load bearing system 2 is returned to the ground in reverse order of the climbing method, and then the bridge substructure prefabricated installation apparatus may be removed, and the bridge pier 10, the cap beam 20 and the middle tie beam may be subjected to subsequent construction treatment.

Compared with the prior art, the invention has the beneficial effects that:

(1) According to the invention, the climbing bearing system 2 is arranged, the bridge prefabricated member is lifted by the rotary lifting system 4, and then the bridge prefabricated member is moved to the installation position by the moving system 3 for lifting, so that the problems that bridge pier, middle tie beam and bent cap sections are matched and intensively prefabricated into bridge prefabricated members, and then the bridge prefabricated members are transported to the site for matching, installation and consolidation into a whole, the bridge pier 10, middle tie beam and bent cap 20 of the bridge in the mountain area, especially the bridge pier 10, middle tie beam and bent cap 20 of the high pier bridge, can only adopt a site installation template system, and the process technology of casting concrete on site is adopted, and as all bridge prefabricated members adopt concentrated prefabrication, the product quality of the bridge prefabricated member is greatly improved, the problems that the reinforced bar protection layer of the prior cast-in-place concrete process is difficult to control and the qualification rate is lower are thoroughly solved, and meanwhile, the bridge pier system is more energy-saving and environment-friendly, and a great amount of construction cost is saved;

(2) The invention is convenient to install and dismantle, can meet the requirements of various geographic environments, improves the quality control, construction safety control and construction cost control of the lower structure of the bridge, and is convenient for popularization and application of bridge construction of high pier columns in different geographic environments.

The present invention is not limited to the preferred embodiments, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention will still fall within the scope of the technical solution of the present invention.

Claims (8)

1. A prefabricated installation device of bridge substructure, which is characterized by comprising:

the bridge pier comprises a structural platform, wherein a through hole for the bridge pier to pass through is formed in the structural platform;

The climbing bearing systems are arranged on the outer sides of the bridge piers, are connected with the structural platform and are used for driving the structural platform to move up and down along the bridge piers, and the number of the climbing bearing systems is at least two;

The moving system is arranged on the structural platform and can move along the structural platform;

the rotary hoisting system comprises hoisting mechanisms, carrying pole beams, rotary mechanisms and lifting appliances, wherein the number of the hoisting mechanisms is at least two and the hoisting mechanisms are arranged on the moving system at intervals, the hoisting mechanisms are detachably connected with the carrying pole beams and used for driving the carrying pole beams to lift, and the rotary mechanisms are respectively connected with the carrying pole beams and the lifting appliances and used for driving the lifting appliances to rotate;

The control system is respectively connected with the climbing bearing system, the moving system and the rotary hoisting system;

The climbing bearing system comprises a first hoop mechanism and a second hoop mechanism which are vertically sleeved outside the bridge pier at intervals and used for clamping or loosening the bridge pier, and two screw climbing mechanisms arranged on two sides of the bridge pier, wherein each screw climbing mechanism comprises a screw support, a transmission screw, a nut assembly and a driving assembly, the top end of each screw support is connected with the structural platform, the bottom end of each screw support is connected with the second hoop mechanism, the transmission screw is arranged in each screw support through a bearing assembly, the transmission screw is rotationally connected with the bearing assembly, the driving assembly is connected with the transmission screw and used for driving the transmission screw to rotate, the nut assembly is in threaded connection with the transmission screw and moves along the transmission screw when the transmission screw rotates, each nut assembly comprises a screw nut and a nut connecting plate, each screw nut is in threaded connection with the transmission screw, each nut connecting plate is sleeved on the outer side of the transmission screw and is arranged on the corresponding screw nut, and the nut connecting plate is connected with the first hoop mechanism;

The climbing bearing system further comprises a roller mechanism, the roller mechanism comprises two roller assemblies and two elastic components, the roller assemblies comprise roller connecting plates and balance rollers, the roller connecting plates are hinged to the bottom ends of the nut connecting plates, the balance rollers are rotatably arranged on the roller connecting plates, the elastic components comprise adjusting screws, pressure springs, pressure plates and pressure nuts, the pressure plates are arranged on the roller connecting plates, the adjusting screws are arranged on the pressure plates in a penetrating mode, the pressure nuts are arranged above the pressure plates and are in threaded connection with the adjusting screws, the pressure springs are sleeved on the outer sides of the adjusting screws, and two ends of the pressure springs are connected with the pressure plates and the nut connecting plates respectively.

2. The bridge substructure prefabricated mounting device of claim 1, wherein the bearing assembly comprises a bearing seat plate, a first thrust bearing, a first locking member, a first fulcrum plate, a second thrust bearing, a regulating plate and a second locking member, the top end of the transmission screw is arranged on the bearing seat plate through the first thrust bearing, the bearing seat plate is arranged on a screw support, the first locking member is arranged on the transmission screw and is in bearing contact with the first thrust bearing, the first fulcrum plate is sleeved outside the bottom end of the transmission screw and is arranged on the screw support, the regulating plate is arranged on the transmission screw and is detachably arranged on one side of the first fulcrum plate away from the bearing seat plate, the second thrust bearing is arranged on the transmission screw and is in contact with one side of the regulating plate away from the first fulcrum plate, and the second locking member is arranged on the transmission screw and is in bearing contact with the second thrust bearing.

3. The bridge substructure prefabricated installation device according to claim 1, wherein the moving system comprises a track arranged at the top end of the structural platform and a translation trolley arranged on the track in a sliding manner, the hoisting mechanism comprises a winch, a steel wire rope connected with the winch, a fixed pulley block arranged on the translation trolley and a movable pulley block detachably arranged on the shoulder pole beam, and the steel wire rope is fixed on the movable pulley block after sequentially bypassing the movable pulley block and the fixed pulley block.

4. The bridge substructure prefabricated mounting device of claim 1, wherein the rotating mechanism comprises a first rotating steel frame, a power unit, a planar bearing and a second rotating steel frame, the first rotating steel frame is arranged on the shoulder pole beam, the power unit is arranged in the first rotating steel frame and connected with the second rotating steel frame and used for driving the second rotating steel frame to rotate, the second rotating steel frame is sleeved outside the first rotating steel frame and connected with the first rotating steel frame through the planar bearing, and the lifting appliance is arranged on the second rotating steel frame.

5. The bridge substructure prefabrication installation device according to claim 1, wherein the first hoop mechanism is a three-leaf pin hinged hoop, the three-leaf pin hinged hoop comprises a first arc module, a second arc module, a third arc module and a plurality of pull-in jacks for locking, fixing or unlocking and separating the first arc module and the third arc module, and the second hoop mechanism has the same structure as the first hoop mechanism;

The structure platform comprises a main beam platform, two first platforms and two second platforms, wherein the penetrating holes are formed in the main beam platform, the first platforms and the second platforms are of rectangular frame structures, the first platforms and the second platforms comprise U-shaped frames and first movable frames, two ends of each first movable frame are detachably arranged at two ends of each U-shaped frame, the main beam platform is connected with the top end of each screw rod support, the two first platforms are respectively in one-to-one correspondence with the two first hoop mechanisms, the second arc-shaped modules of the first hoop mechanisms are movably connected with the U-shaped frames of the corresponding first platforms through a plurality of first connecting assemblies, and the first arc-shaped modules and the third arc-shaped modules of the first hoop mechanisms are respectively movably connected with the U-shaped frames of the corresponding first platforms through the first connecting assemblies;

The two second platforms are respectively in one-to-one correspondence with the two second hoop mechanisms, the second arc-shaped modules of the second hoop mechanisms are connected with the corresponding U-shaped frames of the second platforms through a plurality of second connecting assemblies, and the first arc-shaped modules and the third arc-shaped modules of the second hoop mechanisms are respectively in movable connection with the corresponding U-shaped frames of the second platforms through third connecting assemblies.

6. The bridge substructure prefabricated installation device according to claim 5, wherein the structural platform further comprises a third platform, a supporting frame and a third hoop mechanism, the third platform is located between the two second platforms and is connected with the main beam platform through the supporting frame, the third platform is of a rectangular frame structure, the third platform comprises two fixing frames which are oppositely arranged and two second movable frames which are oppositely arranged, two ends of each second movable frame are respectively detachably installed on the two fixing frames, and the two fixing frames of the third platform are respectively connected with the third hoop mechanism through a fourth connecting assembly.

7. The bridge substructure prefabricated installation apparatus according to claim 5, wherein the first connection assembly comprises a fourth bracket steel plate, a second bracket upper suspension plate and a second bracket lower suspension plate, the second bracket upper suspension plate is connected to the first platform, the second bracket lower suspension plate is rotatably disposed on the second bracket upper suspension plate and connected to the fourth bracket steel plate, and the fourth bracket steel plate is connected to the first hoop mechanism;

The second connecting assembly comprises a first bracket steel plate and two first bracket connecting plates respectively arranged on two sides of the first bracket steel plate, one first bracket connecting plate is detachably connected with a second arc-shaped module of the second hoop mechanism, the other first bracket connecting plate is detachably connected with a first bracket fixing plate, and the first bracket fixing plate is connected with a U-shaped frame of the second platform;

The third coupling assembling includes second bracket steel sheet, third bracket steel sheet, second bracket fixed plate, first bracket upper suspension plate, first bracket lower suspension plate and third bracket fixed plate, the one end of second bracket steel sheet can dismantle with the first arc module or the third arc module of second staple bolt mechanism and be connected, the other end upper portion and the third bracket steel sheet of second bracket steel sheet are connected, the last suspension plate setting of first bracket is in third bracket steel sheet bottom, the first bracket lower suspension plate rotates and sets up on the last suspension plate of first bracket, and with third bracket fixed plate is connected, third bracket fixed plate is connected with the U type frame of second platform, the both ends of second bracket fixed plate can dismantle with second bracket steel sheet and third bracket fixed plate respectively and be connected.

8. A bridge substructure prefabrication installation construction method based on the bridge substructure prefabrication installation device according to any one of claims 1-7, comprising the steps of:

s1, prefabricating pier segments, middle tie beam segments and capping beam segments, wherein the pier segments comprise pier column segments and pier tie beam segments, and the capping beam segments comprise capping beam pier column segments and capping beam span middle segments;

S2, marking pier positions of all piers and a placement position for placing a climbing bearing system, installing a prefabricated installation device of a lower structure of a bridge, placing the climbing bearing system at the placement position, and anchoring a structural platform by using a cable;

s3, constructing the bridge pier in stages through the bridge substructure prefabrication and installation device;

S31, for each construction stage, using a rotary hoisting system to install pier segments according to a pre-marked sequence to form piers, until the height of the piers installed in the construction stage reaches a preset first set height;

s32, driving the structural platform to climb along the pier by using the climbing bearing system to preset a second set height;

s33, repeating the step S31 and the step S32 until the installation of the bridge pier is completed;

S4, installing the capping beam pier column sections on each pier by using the rotary hoisting system, and installing capping beam span sections between two adjacent capping beam pier column sections by using the rotary hoisting system;

s5, installing a middle tie beam from top to bottom by utilizing the rotary hoisting system;

s51, reserving one lifting mechanism to be connected with the shoulder pole beam, removing the connection between the rest lifting mechanisms and the shoulder pole beam, lowering the shoulder pole beam below the capping beam through the lifting mechanism connected with the shoulder pole beam, and then connecting all the lifting mechanisms with the shoulder pole beam;

S52, installing the middle tie beam section to a preset installation position by utilizing the rotary hoisting system, so that the middle tie beam section is fixed with two adjacent bridge pier tie beam sections;

s53, reserving one lifting mechanism to be connected with the shoulder pole beam, disconnecting the other lifting mechanisms from the shoulder pole beam, lowering the shoulder pole beam below the installed middle tie beam through the lifting mechanism connected with the shoulder pole beam, or driving the lifting mechanism and the shoulder pole beam to move to another installation position through the moving system, and then connecting all the lifting mechanisms with the shoulder pole beam;

S54, repeating the steps S52 to S53, and installing all middle tie beam sections according to a pre-marked sequence;

S6, driving the structural platform to descend to the ground along the bridge pier through the climbing bearing system, and removing the bridge substructure prefabricated installation device.